far as i know, the Gsi Corsa came with optional electric windows/mirrors but the sunroof was manual on all as standard! but the motor for it will fit sraight out of a cavalier or carlton.

i think the interior door handle bit has the buttons for the windows on standard electric windows, my windows are a unversal fit and the switches were put were the window winders were to cover up the holes and a feed for the wires

i don't know if they changed the interior layout on gsi, but on my sport the leccy window switches are on the door pocket and on the driver side interior handle directional button for the leccy mirrors.